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Non-halogen flame-resistant thermoplastic elastomer composition, manufacturing method thereof, and electric wire or cable in which its elastomer composition is used

a thermoplastic elastomer and composition technology, applied in the direction of fireproof paints, etc., can solve the problems of difficult to set the color hue of the molding freely, limit the softness of the composition to a halogen system material such as polyvinyl chloride, and emit nasty smells. achieve the effect of the same softness

Inactive Publication Date: 2008-01-31
HITACHI CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0016]Therefore, An object of the present invention is to provide non-halogen flame-resistant thermoplastic elastomer composition, which has no problem of the nasty smell and the coloring, can select freely the polyolefin based resin, and has the same softness as halogen system material, manufacturing method thereof, and electric wire or cable in which its elastomer composition is used,
[0025]An excellent non-halogen flame-resistant thermoplastic elastomer composition in elastic behavior and flame resistance can be offered according to the present invention. Especially, the composition of the present invention can be melt by heat after cross-linking, thus can be molded, because ethylene vinyl acetate copolymer cross-linked with silane is dispersed into crystalline polyolefin based resin. Accordingly, it has the recyclability. Moreover, this composition possesses at the same time high mechanical strength, heat resistance, and oil resistance, and is suitable as material of the coatings of electric wires and cables such as power supply codes, cabtire cables, etc.

Problems solved by technology

However, in the cross-linking by sulfur, there are problems that it is difficult to set the color hue of the molding freely because of coloring, and that the nasty smell is issued in the generation of sulfidization-system gases.
Moreover, it is necessary to choose the resin to which the crosslink does not happen easily because polyolefin based resins which is the flow component are cross-linked simultaneously in the crosslink by organic superoxide.
As a result, there is a limit to bring the softness of the composition close to a halogen system material such as polyvinyl chloride.

Method used

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  • Non-halogen flame-resistant thermoplastic elastomer composition, manufacturing method thereof, and electric wire or cable in which its elastomer composition is used
  • Non-halogen flame-resistant thermoplastic elastomer composition, manufacturing method thereof, and electric wire or cable in which its elastomer composition is used
  • Non-halogen flame-resistant thermoplastic elastomer composition, manufacturing method thereof, and electric wire or cable in which its elastomer composition is used

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embodiments

[0073]Embodiments of the present invention will be concretely explained hereinafter.

[0074]The material was made according to a process where silicon analogues are graft-copolymerized to ethylene vinyl acetate copolymer, and a process where compounding ingredients such as ethylene vinyl acetate copolymers in which silicon analogues are graft-copolymerized, crystalline polyolefin resins, metalhydroxides, and silanol condensation catalysts are mixed to cross-link ethylene vinyl acetate copolymer by silane.

[0075]In the process where silicon analogues are graft-copolymerized to ethylene vinyl acetate copolymer, raw materials where ethylene vinyl acetate copolymers (the content of vinyl acetate is 25, 30, and 42 wt %), vinyl trimethoxysilanes, and dicumylperoxides are impregnated and mixed at the ratio of 100 / 3 / 0.01 parts by weight or 100 / 5 / 0.02 parts by weight are prepared. These were extruded so that retention time may become about five minutes by using 40 mm extruder at 200° C. (L / D ra...

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Abstract

Non-halogen flame-resistant thermoplastic elastomer composition, manufacturing method, and an electric wire or cable in which non-halogen flame-resistant thermoplastic elastomer composition is used for an insulator or a sheath are provided. Non-halogen flame-resistant thermoplastic elastomer composition includes (A) 40 to 80 parts by weight of ethylene-vinyl acetate copolymer, in which the content of vinyl acetate is 30 wt % or more; (B) 60 to 20 parts by weight of crystalline polyolefin resin; and (C) 40 to 250 parts by weight of metalhydroxide for 100 parts by weight in total of (A) and (B). Further, ethylene-vinyl acetate copolymer is cross-linked with silane.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates to non-halogen flame-resistant thermoplastic elastomer composition which excels in elastic behavior and flame resistance and has high mechanical strength, heat resistance, oil resistance, and recyclability at the same time, and especially to non-halogen flame-resistant thermoplastic elastomer composition obtained by cross-linking with silane while mixing ethylene vinyl acetate copolymer in which vinyl acetate content is 30 wt % or more, manufacturing method thereof, and an electric wire or cable in which its elastomer composition is used[0002]The activity to the environmental protection is rising worldwide. in the field of electric wire coating material, the material which does not generate poisonous gas when burning, which can decrease environmental pollution when disposed, and which can recycle have rapidly prevailed.[0003]Generally as such a material, there is a composition in which non-halogen flame retarder such as ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C09K21/14
CPCC09K21/14C09K21/02
Inventor INOUE, TAKASHISUGITA, KEISUKEABE, DAISUKEKIMURA, HITOSHIWATANABE, KIYOSHI
Owner HITACHI CABLE
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